/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.streaming.connectors.kinesis.util;

import org.apache.flink.annotation.Internal;

/**
 * Internal use.
 */
@Internal
public class TimeoutLatch {

	private final Object lock = new Object();
	private volatile boolean waiting;

	public void await(long timeout) throws InterruptedException {
		synchronized (lock) {
			waiting = true;
			lock.wait(timeout);
		}
	}

	public void trigger() {
		if (waiting) {
			synchronized (lock) {
				waiting = false;
				lock.notifyAll();
			}
		}
	}
}
